Hi All, I thought I'd buy myself an early Chrissie present.
On a budget,so, I researched and came up with SIGMA APO 150-500 F5-6.3 DG OS HSM. Just arrived today from Hong Kong, the only problem is it has no OS.The Description and pictures on E-Bay were OS version...SIGMA APO 150-500 F5-6.3 DG OS HSM....the Lens is not, the box has no OS on it(SIGMA APO 150-500 F5-6.3 DG HSM) ,but the instruction manual(sheet) enclosed states SIGMA APO 150-500 F5-6.3 DG OS HSM.

I'm new to all this and have a limited understanding of OS(optical stabilization) and alike. How important is OS ?,and if they have made a genuine mistake, should... (1) I try to get reduction on the price paid or (2)post it back and wait for the OS version.

Steve